Discrete wavelet analysis of mutually interfering co-existing welding signals in twin-wire robotic welding

Kumar, Manish and Quadir Moinuddin, Syed and Kumar, S. Surya and Sharma, Abhay (2021) Discrete wavelet analysis of mutually interfering co-existing welding signals in twin-wire robotic welding. Journal of Manufacturing Processes, 63. pp. 139-151. ISSN 15266125

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The article presents new findings on arc stability in twin-wire robotic arc welding corresponding to the torch orientation and electrodes' position. The two mutually influencing co-existing arcs affect the stability of counterpart arc, and thereby alter the weld bead properties. The complex interaction between the arcs is determined by multi-resolution time-frequency spectrum using wavelet analysis. The wavelet-energy-entropy of the signals are analyzed to quantify the arc stability. Several experiments are conducted with different combinations of welding currents at primary and secondary electrodes (vis-a-vis one who initiates and follows the arching sequence, respectively) in tandem and transverse orientation of the torch. The investigation divulges that electrode positions and torch orientation significantly impact arc stability which in turn impacts the heat input and weld bead geometry. The arc penetration in tandem orientation is augmented by the secondary arc that operates in the same weld pool. While the transverse orientation improves the arc stability and facilitates a wider weld bead with reasonable weld penetration suitable for applications such as wire additive manufacturing and cladding. An approach for predicting arc stability as a function of process parameters is a significant contribution from this investigation. The insight into the arching phenomenon in twin-wire gas metal arc welding due to the investigation is expected to help the machine builders to design an appropriate controller that minimizes arc interference.

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IITH Creators:
IITH CreatorsORCiD
Quadir Moinuddin, SyedUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: Discrete wavelet analysis; Machine builders; Process parameters; Robotic arc welding; Robotic welding; Transverse orientation; Weld bead geometry; Weld penetrations
Subjects: Others > Mechanics
Others > Aerospace Technology
Divisions: Department of Mechanical & Aerospace Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 20 Jul 2021 06:45
Last Modified: 20 Jul 2021 06:45
URI: http://raiith.iith.ac.in/id/eprint/8453
Publisher URL: http://doi.org/10.1016/j.jmapro.2020.04.048
OA policy: https://v2.sherpa.ac.uk/id/publication/13996
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